Powertap C1 Chainring Review


​The Powertap C1 power meter has been reviewed by Tristan Haskins for Power-Pedals.com. A fully featured, crank-based power meter that features dual-sided measurement (estimated, not actual). The chainring is a one-piece FSA-made design ensuring stiffness for shifting no matter the terrain. The C1 is available in 53/39, 52/36 and 50/36T options (5 bolt, 110 BCD cranks). It is reasonably easily mounted to your bikes existing hardware. For future proofing the PowerTap C1 (like all other Powertap products) broadcasts training data in both ANT+ and Bluetooth SMART.

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How easy is it to install the Powertap C1 power meter chainring? I give the same answer for all power meters, it depends on who’s installing it. Personally I’d struggle to fit this system but I know a man who can. The left crank arm needs to be removed first, this is quite easy and can be done with limited tools and no specialist skill. Next the right side drive-train and axle are removed complete with chain ring assembly.

Transfer your existing crank arm and spider to the new Powertap C1 chainring. The complete drivetrain assembly is then inserted back in to the bottom bracket and the left crank arm fitted. Personally, it’s too much for me. I’d suggest asking your local bike shop what they’d charge to fit it. However, I know a lot of cyclists that could do this quite easily, ask around and you may find someone who can do it for you / teach you how to do it ….

The images below show Justin Henkel from Powertap removing the old chainring and replacing it with the new C1 power meter chainring

​The C1 is a hugely popular power meter due to it’s accuracy, long battery life, relative ease of installation and estimated LEFT and RIGHT leg power balance. If you want actual measured power balance the options are limited to more expensive units like the dual sided power metering pedals, the 2INPower crankset and the 4iiii Dual sided system. If you are happy to train with TOTAL power only, from a single leg measurement, then consider the 4iiii Precision crank arm or the PowerTap P1S (single sided). These two alternatives are far easier to fit and require no workshop skill or specialist tools.

  • Crank Interface: 5 bolt, 110 BCD compact
  • Connectivity: ANT+ and Bluetooth SMART
  • Tooth Combinations: 50/36, 52-36 and 53/39
  • Firmware Updates: Over the air
  • Added Weight: About 150 grams
  • Battery: CR2032
  • Battery Life: 200 hours
  • ​Remember, the Powertap C1 does provide detailed LEFT and RIGHT power balance, but it’s not ACTUAL. It’s only an estimation. From various detailed tests and third party reviews it’s a very good estimation, making the C1 one of the best value power meters on the market providing power balance data.

    How to Install the C1 Power Meter

    Justin Henkel from Powertap shows how to install the C1 chainring. If you have ever removed your drive-side crankarm and botton bracket axle assembly it shouldn’t present too much trouble. Another advantage of the C1 system is that you get to use your existing crank arms, axle etc

    The purpose of Power-Pedals.com product presentations is to give the visitor a summary overview of each power meter. They are NOT intended as an in-depth technical review, more a summary providing essential top level features, functions, pros and cons. Further information can be found at these links to other external reference sites.

    The Powertap C1 sits between the expensive DUAL sided power meters like the 2INPower crankset / Powertap P1 pedals and the cheaper single sided solutions like the 4iiii crank arm power meters. The C1 has it’s strain gauges in the chainring assembly and measure actual power from the right leg (drivetrain side). What is also does, that you won’t get from crank arm solutions, is estimate the LEFT and RIGHT power balance. It’s not an ACTUAL bi-lateral power measurement, just an accurate estimation. From several third party reviews and reports I’ve consulted it seems to be very good.

    Read Related Article: Rotor INPower 3D+ Review

    Currently I am training with a power meter crank arm, mainly because they’re reasonably cheap and easy to fit. However, I am attracted to the Powertap C1 as my next upgrade because of this power balance option. Other attributes of this product that I find appealing are it’s 200 hour battery life (from a CR2032) and the super simple battery change process. It also features built-in sensors that eliminate the need for an external CADENCE sensor (no magnets or cable ties)

    I read the Powertap website intro when researching this product and want to share this quote describing their products ….

    “The bottom line is our shit just works, day after day, year after year. If it didn’t, well then we would never been able to sell more power meters than anyone else in the history of cycling power meters. End of story

    We will be happy to hear your thoughts

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